chtMultiregionFoam relaxation problem

In the Pimple mode with relaxation of p_rgh, the chtMultiregionFoam solver returns an error message of "not stored. Use field.storePrevIter()" I found the solver already includes a function call of storePrevIter(). So I think that it is out of my job.

The solver in v1906 is same as the v1912. With the same fvSolution file, OF-7 runs good.

Could you please check the reason?

My recommendation is to update solutioncontrol classes in v1912 similar to those in OF-7